[S13<3]

its a pico frag tank, its been running for 5 months in a plastic tub with leathers, mushrooms, xenia, and gsp under a clamp lamp with a spiral compact flourecent, everthing was transfered to the new tank and is doing great but i want to start keeping some sps in ther like digitada's, so i need better lighting, the 18w and 6w are the only 2 small fixtures i saw, but theyre not popular sizes and not the easiest or cheapest bulbs, so its kind of a huge turnoff, im not sure what other options i can use here :/